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@(@\newcommand{\W}[1]{ \; #1 \; } \newcommand{\R}[1]{ {\rm #1} } \newcommand{\B}[1]{ {\bf #1} } \newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} } \newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} } \newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} } \newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }@)@ This is cppad-20221105 documentation. Here is a link to its current documentation .
Print a C++ AD Graph: Example and Test

Source Code 

# include <cppad/cppad.hpp>

bool print_graph(void)
{   bool ok = true;
    using std::string;
    //
    // AD graph example
    // node_1 : p[0]
    // node_2 : p[1]
    // node_3 : x[0]
    // node_4 : p[0] + p[1]
    // node_5 : x[0] + ( p[0] + p[1] )
    // y[0]   = x[0] + ( p[0] + p[1] )
    //
    // C++ graph object
    CppAD::cpp_graph graph_obj;
    //
    // operator being used
    CppAD::graph::graph_op_enum op_enum;
    //
    // set scalars
    graph_obj.function_name_set("print_graph example");
    size_t n_dynamic_ind = 2;
    graph_obj.n_dynamic_ind_set(n_dynamic_ind);
    size_t n_variable_ind = 1;
    graph_obj.n_variable_ind_set(n_variable_ind);
    //
    // node_4 : p[0] + p[1]
    op_enum = CppAD::graph::add_graph_op;
    graph_obj.operator_vec_push_back(op_enum);
    graph_obj.operator_arg_push_back(1);
    graph_obj.operator_arg_push_back(2);
    //
    // node_5 : x[0] + ( p[0] + p[1] )
    graph_obj.operator_vec_push_back(op_enum);
    graph_obj.operator_arg_push_back(3);
    graph_obj.operator_arg_push_back(4);
    //
    // y[0]   = x[0] + ( p[0] + p[1] )
    graph_obj.dependent_vec_push_back(5);
    //
    // get output of print command
    std::stringstream os;
    graph_obj.print(os);
    //
    std::string check =
        "print_graph example\n"
        "          1      p[0]\n"
        "          2      p[1]\n"
        "          3      x[0]\n"
        "          4       add    1    2\n"
        "          5       add    3    4\n"
        "y nodes = 5\n"
    ;
    std::string str = os.str();
    ok &= str == check;
    //
    return ok;
}
Input File: example/graph/print_graph.cpp